//
//  UIButton+Extension.swift
//  weibo
//
//  Created by apple on 16/4/7.
//  Copyright © 2016年 wangjianwei. All rights reserved.
//

import UIKit

extension UIButton {
    
/// 便利构造函数
    convenience init?(imageName: String, backImageName: String) {
        self.init()
        
        setImage(UIImage(named: imageName), forState: UIControlState.Normal)
        setImage(UIImage(named: imageName + "_highlighted"), forState: UIControlState.Highlighted)
        setBackgroundImage(UIImage(named: backImageName), forState: UIControlState.Normal)
        setBackgroundImage(UIImage(named: backImageName + "_highlighted"), forState: UIControlState.Highlighted)
        
        // 根据图片大小调整尺寸
        sizeToFit()
    }

    /**
    *  构造便利函数
    */
    convenience init(title: String, color: UIColor, imageName:String) {
        self.init()
        setTitle(title, forState: UIControlState.Normal)
        setTitleColor(color, forState: UIControlState.Normal)
        setBackgroundImage(UIImage(named: imageName), forState: UIControlState.Normal)
        
    }
}
